Trimmer.



Patented-May I, |900. J. H. SHANTZ.

TRIMNIER.

(Application iled Sep. 23, 1899.)

' 2 Sheets-Sheet I.

Nof 648,385.

(No Model.)

INI/ENTOR llllll.

y WITNESSES fa, 4:. WW

Attofneys.

DI Z.. T N A H S H. J.

TRIMMER. Y

(Application med Sept. 2S, 1899.)

2 Sheets-Sheet 2` (No Model.)

BKR

I/I/ITNESSES M A itorneys.

ns cn.. F

UNITED STATES PATENT OFFICE.

JOI-IN H. SHANTZ, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-THIRD TO DEVITT C. CHAPMAN, OF ECORSE, MICHIGAN.

TRIMMER.

sPEcrFicAT'ION roining part of Letters Patent No. 648,885, dated May 1, 1'90'0. Appunti@ nea september 23,1899. serial No. 731,433. uit man.)

To all whom t may concern.'

Be it known that I, JOHN H. SHANTZ, a citizen of Canada, residing at Detroit, county of l/Vayne, State of Michigan, have invented a certain new and useful Improvement in Trimmers; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to trimming machines, and has for its object an improved machine adapted to trim off the ends of molding and finishing material.

The machine is arranged to be set to'trim the board at any angle to the main axis of the material and to trim molding of any desired length and bring it accurately to a given size.

In the drawings, Figure l is a plan View of the main part of the machine. The trimminghead is shown in section. Fig. 2 is an elevation of the machine with an auxiliary supporting-table attached thereto. Fig. 3 is a plan view of the auxiliary table. Fig. 4 is a view, on an enlarged scale7 showing the gageholding mechanisms. Fig. 5 shows anvangled face-plate to be used with the carriage shown in Fig. 3. Fig. 6 is a cross-section through the auxiliary table F and part of the sliding carriage G. p

A indicates a table which is bounded by circular arcs a on its right and left sides.

B indicates a cutter-head which is located along a middle diameter between the arcs a.

The periphery of the table does not necessarily form a complete circle, as the arched periphery is only useful in places.

The back of the table behind the cuttingknives is on a chord b of the circle and the front periphery cis on a chord a of the circle.

C and I) indicate grooves in the table A, and in these grooves are located slides c and CZ. The slides are arranged to be held by setscrews c2 and d2.

E indicates a gage and side support for the Work. The gage is held to the sliding blocks c and d by means of set-screws c3 and d3, which pass through long slots in the gage E. The gage E is held securely at any angle with respect to the edge of the trimming-knife B by shifting the blocks c' and d' until the gage assumes the proper angle, and the gage is then' shifted in or out with respect to the trimmingknives B, as may be desired. The trimmingknives B are on a frame that is circular and mounted on a shaft b', that is supported in suitable bearings under the table and is provided with a driving-pulley be. The knives are held to arms of the frame, so that the shavings or trimmings pass between the arms into the chamber between the two 'adjacent trimmer-faces b2 and b3. The knives are covered by a casing b4, that entirely surrounds them, except at those portions where the material to be treated engages with them. Those portions of the covering which are indicated in Fig. l as between the points b5 and h6 are cut away. At all other parts the covering prevents accidental injury from the knives. On the under side of lthe cutter-head the covering b4 is continued downward to an outlet o7, through which the shavings or trimmings drop to the iioor or into a conveyer. The upper half of the casing b4 is made separate from the lower half and is hinged to the table at t, sc that it may be thrown back if for any purpose it is desired to have access to the knives.

Findicates an. auxiliary support or table that is held to the main table A by a rim that projects downward from the edgeof the table A and engages in an arched groove at the end of the auxiliary table F. The engagement allows the auxiliary table F to be swung on the main table, and it holds the auxiliary table so that it points radially out from the center of the main table. The auxiliary table F is provided with a sliding carriage G, and the sliding carriage G is held to the table-top in any suitable way, so that it may travel lengthwise of the top of the auxiliary table F, but is held from escaping therefrom. The carriage G supports a sliding yoke` g, through which extends a pressure-bar g', that is -provided on its front end with a head g2.

g3 is a spring acting to exert a yielding pressure toward the cutter upon the pressurebar g. A set-screw g4 is arranged to hold the bar g with respect to the yoke g. The carriage itself is held frommovement along the auxiliary table when it is desired to have the carriage stationary by a set-screw h, that engages against the under Pside of the table.

IOO

-plate g2 is shaped for the particular work to vzo The yoke is provided with a draw-chain K, that extends over a sheave 7s, that reaches to a foot-lever k'. The chain K is made in two parts. That part of the chain which extends over the sheave k terminates with aphook 7a2, that engages with that'partof the chain which engages the yoke G. The chain, being in' two parts held together bya hook of the one part engaging in one of the links of the other part, is adjustable as to length, and the carriage may be located at any place along the tabletop F without other changes in the draft appliance which vis attached toit exceptrto unhook and rehook the hook and'V chain.

The table-top Ais provided on each siderof* the trimmer-head with a hole a2 large enough to admit the hand of the workman, theob ject of the hole being to enable the workman to place his ingers under a portion of the material Ithat is being treated, either when the material is short or when for any reason-it is desirable to secure a rm grip on the material.

In operation the gage-guide E is set to the proper angle with thc trim mer-knives by loosening the setting-blocks c and CZ', sliding the blocks until the gage takes the proper angle, and then setting up the auxiliary table with its surface in line with the gage on the main table, the surface of the auxiliary table being in front ofthe gage-line. The carriage G is brought to about the position which it is to take in order that the plate g2 may press against the rear end of the material. The material to be trimmed is placed on the table against the gage, with its rear or outer end engaging against the face-plate g2. This facebe done, sometimes being flat, as in Fig. 3,

and sometimes being angled, as in Fig. 5.

The material is then pressed against the tri-mmer by pulling the yoke on the carriage Gby means of the foot-lever 7o'. The trimming is continued until the material is cut to the proper lengthjwhich is indicated by the posif, tion the yoke takes along the graduated edge of the table-top F.

- The carriage G and the graduated'table are especially useful in treating pieces of sucha length that the workman cannot from his position near the trimmer-head see accurately the location ot' the rear end on the table. The carriage being fixed by the set-screw,the yoke canbe drawn forward only la limited distance.

1. In combination with a guarded rotary trimming-knife, a work-supporting table, and adjustable gage-guides, said table being provided with holes whereby Work lying thereon may be grasped from the under side, substantially as described.

2. In combination with a work-supporting table having a curved edge,an auxiliary Worksupporting table engaging-with the curved edge of the main table, and arranged to be swung around the center of the main table, substantially as described.

3. In combination with a rotary trimmer, a main table having a curved periphery,an auxiliary table arranged to engage the main table, a carriage on said auxiliary table, a yoke supported by the carriage, and means for applying power to said yoke, whereby it may engage the rear end ofthe work, and press the work forward against the trim ming-knife,sub stantially as described.

4. In combination with a Work-supporting table, having a curvededge, and a verticallyprojecting rim having the curvature of said edge, an auxiliary work-supportin g table provided with a groove adapted to engage said vertically-projecting rim, whereby said auxiliaryv work-supporting table is arranged to be swung aroundthe center of the main table, substantially as described.

In testimony whereof Isign-this specification in the presence of two witnesses.

Jox-1N u. sHANrZ. lVitnesses:

JOHN N. GooDRIcH, M. E. Kerr. 

